dorsal/arxiv
View SchemaHigh Harmonic Generation in SF$_{6}$: Raman-excited Vibrational Quantum Beats
| Authors | Zachary B. Walters, Stefano Tonzani, Chris H. Greene |
|---|---|
| Categories | |
| ArXiv ID | physics/0701113 |
| URL | https://arxiv.org/abs/physics/0701113 |
| DOI | 10.1088/0953-4075/40/18/F01 |
Abstract
In a recent experiment (N. Wagner et al., PNAS v103, p13279) on SF$_{6}$, a high-harmonic generating laser pulse is preceded by a pump pulse which stimulates Raman-active modes in the molecule. Varying the time delay between the two pulses modulates high harmonic intensity, with frequencies equal to the vibration frequencies of the Raman-active modes. We propose an explanation of this modulation as a quantum interference between competing pathways that occur via adjacent vibrational states of the molecule. The Raman and high harmonic processes act as beamsplitters, producing vibrational quantum beats among the Raman-active vibrational modes that are excited by the first pulse. We introduce a rigorous treatment of the electron-ion recombination process and the effect of the ionic Coulomb field in the electron propagation outside the molecule, improving over the widely-used three-step model.
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"abstract": "In a recent experiment (N. Wagner et al., PNAS v103, p13279) on SF$_{6}$, a\nhigh-harmonic generating laser pulse is preceded by a pump pulse which\nstimulates Raman-active modes in the molecule. Varying the time delay between\nthe two pulses modulates high harmonic intensity, with frequencies equal to the\nvibration frequencies of the Raman-active modes. We propose an explanation of\nthis modulation as a quantum interference between competing pathways that occur\nvia adjacent vibrational states of the molecule. The Raman and high harmonic\nprocesses act as beamsplitters, producing vibrational quantum beats among the\nRaman-active vibrational modes that are excited by the first pulse. We\nintroduce a rigorous treatment of the electron-ion recombination process and\nthe effect of the ionic Coulomb field in the electron propagation outside the\nmolecule, improving over the widely-used three-step model.",
"arxiv_id": "physics/0701113",
"authors": [
"Zachary B. Walters",
"Stefano Tonzani",
"Chris H. Greene"
],
"categories": [
"physics.atom-ph",
"physics.chem-ph"
],
"doi": "10.1088/0953-4075/40/18/F01",
"title": "High Harmonic Generation in SF$_{6}$: Raman-excited Vibrational Quantum Beats",
"url": "https://arxiv.org/abs/physics/0701113"
},
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